William b



(No Model.) W; B. TURNER- LOGOMOTIVE BRAKE. No. 278,471. Patented May29,1883.

jaw/Z727? UNITED STATES PATENT OFFICE.

WILLIAM B. TURNER, on NEW YORK, N. Y., AssIeNoR- on ONE-THIRD TO THETORREY AUTOMATIC BRAKE COMPANY, OF NEW YORK.

LOCOMOTIVE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 278,471, dated May 29,1883. Application filed March 15, 1882. (No model.)

To all whom it may concern .1

Be it known that I, WILLIAM B. TURNER, a citizen of the United States,and a resident of the city, county, and'State of New York, have inventeda new and useful Improvement in Locomotive-Brakes, of which thefollowing is a specification.

The object of my invention is to enable the brake-pressure to be appliedwith equal force to opposite sides of each driving-wheel. 'To this end Iemploy shoes each suspended from the locomotive-frame or from someattachment thereto by a hanger, and moved to and from the tread. of thewheel by a pitman actuated by a crank. The several eran ks are operatedby any convenient motor or motors. They may allbe attached rigidlytoconnecting or impulse rods actuated. by the motor, so that all the shoeswill be advanced or retired through equal distances r'elatively witheach movement of the motor. If preferred, equalizing-levers or otherwell-known equivalent devices may be interposed between the motor andany pair, set, or system of the said shoes, so that each of said pairsor systems shall be advanced to abearing against the tread of the wheeland serveinits turn as a fulcrum for the remainder.

In order that my invention may be fully understood, I will proceed todescribe it with reference to the accompanying drawing, which representsa side view of the driving-wheels of a locomotive with my improvedbrakes applied thereto. 7

F F represent parts of the frame of a locomotive, and D D.thedriving-wheels.

A A are brake-shoes suspended by hangers B B from the frame F, andconnected by pitmen or rods O to crank-arms E,keyed or otherwise rigidlyfixed to the shaft G, to which are also fixed operating-arms H,connected together by rods I I. One shaft, G, of the system is actuatedby a suitable motor, piston, or diaphragm. For illustration I have shownat J a cylinder with a pitman, K, actuating an arm,'L, keyed on theshaft G, which latter acts on its own shoes byits arms E and pitmen 0,and at the same time, through its arms H and the connecting-rods I, actssimultaneously on all the other arms H, shafts G, crankarms E, pitmen O,and shoes A of the system,

all the-shoes have a positive and equal movement. My system in-thisrespect differs from those in common use, in which the brake-shoes areadvanced by an arrangement whereby as soon as any one of the shoes is incontact with the wheel it becomes a fulcrum for all its fel- 6o lows,and so until when all are applied each one has become a fulcrum forevery other. In my system I may thus fulcrum one side or one pairofbrakes against the other pairs, and each shoe is always related to atleast one other in 6 such wise that their movementsare exactly equal andsimultaneous, both in distance and in time; and hence the application ofequal pressure to the wheels is provided not bythe fulcruming of oneshoe attachment to another, as under the ordinary system, but by properoriginal mounting and location of the respective shoe attachments. Myinventionwill be seen torelate exclusively to locomotive-brakes, andhence has no connection with car-brakes in which the shoes are connectedby transverse beams passing beneath the car, such beams beinginapplicable to driver-brakes of locomotives.

claim as new, and desire to secure by Letters Patent, is-- Having thusdescribed my invention, what I In a brake mechanism consisting of aseries of brake-shoes arranged in. two sets, one upon each side of thevehicle, the set upon one side 8 being independent of the set on theother side, a series of rock-shafts swiveled upon the vehicle-frame andactuated simultaneously and through equal distances by.pitmenone to eachshaft-said pitmen being severally attached to and actuated by or fromthe outer arms of the rock shafts, the inner arms of said shafts beingall connected by rods or equivalents having longitudinal movementscommunicated from the brake-motor, the shoes being arranged one at eachside of each of the wheels.

WILLIAMB. TURNER. I Witnesses: e

FREnERIoK'GRAsMUoK, O. H. BETJIMAN.

